The bosses scale way too fast in comparison to everything else, the game completely stalls. Look at the leader boards to see how each higher level is so much more sparsely populated than the next. You can get to 16 in a day and the people at level 22 have probably had the game running since it was released 15 days ago, so 6 more levels in 14 days.
Uggghhh, why oh why is this game on the best of 2010 achievement, I have done all the other ones, but can't stand playing this game long enough to get it, 50 points thrown in the trash
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